RVs are High!!! The Conclusion!!

Daveinet wrote:
One other option would be some well placed photo sensors connected to a very loud buzzer. You can only look at so many things at the same time, so an audible warning would just tell you to stop, before damage is done.

OK, so taking my post into the DIY realm, Drill a hole into the concrete floor near the door entrance on either side. Put an eye hook in each hole. Tie a fishing line vertical to a microswitch at the top, with a piezoelectric buzzer connected to it. This way if you tag the line, the buzzer will go off and warn you to stop. While optical may seem slick, optical sensors get dirty, especially if they are aimed straight up. A simple fishing line should last forever. I'd be inclined to test it before each use. I just keep thinking along the lines of what Dennis said, you can do it 100 times and always be careful, but at some point the odds are against you. Having an audible warning should prevent that. I also like what 06Fargo said about painting stripes on the drive to help you get lined up, before you enter the garage. This will be especially true as your driveway is up hill. That slant can throw off your perception when lining things up.